Commutator provided with segments or bars and slip-rings.



B. LJUNGSTRDM OOMMUTATOR PROVIDED WITH SEGMENTS 0R BARS AND SLIP RINGS.APPLICATION FILED JAN. 24, 1914.

1,102,525, Patented July 7, 1914.

UNITED sTAT sr rEnr ontuion.

BIRGER LJUNGs'iRoM, or' s'rocKnoLiav sWEDEii, ASSIGNOR T0 AKTIEBODAGETLJUNGsTRoMs ANGTURBIN, 0F riNsrANG, SWEDEN. I

Specification of Letters Patent.

Patented Jul y 7, 1914.

Application filed January 24, 1314. Serial No. 814,140.

To all ill/1 um 1''], In my COWI'KI')! Be it known that l. BIRGERLJUNos'riioii, a abject of the King. oi Sweden, and a citi- Zen ofSweden, residing at No. legeringseatan, Stockholm, in the Kingdom ofSweden, have invented certain new and useful Improvements inCon'imutators Provide'd with Segments or Bars and Slipliling of whichthe-following is a specification.

This invention relates to an improvement in con'iniutatorsprovided withsegments and rings and has for its objects to secure more effectivecontact, to lessen the. production of heat, to reduce Friction and tocheapen the cost of construction.

To these ends the said invention consists in the construction andcombination of parts hereinafter more particularly set forth andclaimed. I

In the accompanying drawings Figure 1 rcpresenls a side elevation of acommutator embodying my invention, partly in longitudinal verticalsection; Fig. 2 represents a detail vertical section enlarged of a partof one of the additional commutators; Fig. 3 represents a diagrammaticview enlarged, of one of the conductors electrically connecting one ofthe additional coimnutators to the main commutator showing also certainproximate parts.

I The commutator shaft 1: is enlarged to form a certain numberofexternal bars 01' segments f, which connect electrically withconductors 2? leading to two additional coininiitators, of less diameterthan the main commutator and arranged one on each side of the latter,said conductors being bent as shown'in Fig. 1 to form in effectcontinuous bars having the same function for the lesser commutators asthe bars or segment-s f have for the main commutators. Rings ,9,

minislied peripheral velocity and leverage.

and is found also to possess other advantages first above named. it isnot necessary tl at more than one additional con'ii'nutator should beemployed.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

l. A commutator provided with a series of external segments or bars, incombination with an additionalcmnmutator of less diameter similarlyprovided with bars electrically connected to the bars first mentionedand rings which fit on the bars of the lesser 'conm'iutator and areelecti'cally connected thereto.

2. A commutator provided with a series of external segments of bars incombination with an additional commutator of less dianr eter alsoprovided with external bars and, with rings surroundingthe same and G.

trically. connected thereto, the latter bars being connected byintegialconductors with the baisor segments of the main commutator.

In testimon whereof I have aiiixed in 1 signature in presence of twoWitnesses.

BIBS-ER LJUNGSTRGM.

Witnesses Vico HAUsEN, Oscar: ENcs'rii'oM.

